package com.ruoyi.framework.web.service;

import com.ruoyi.common.constant.CacheConstants;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.model.CityLoginUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.core.domain.model.ShopLoginUser;
import com.ruoyi.common.core.redis.RedisCache;
import com.ruoyi.common.utils.ServletUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.ip.AddressUtils;
import com.ruoyi.common.utils.ip.IpUtils;
import com.ruoyi.common.utils.uuid.IdUtils;
import eu.bitwalker.useragentutils.UserAgent;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * token验证处理
 *
 * @author ruoyi
 */
@Component
public class TokenService {
    protected static final long       MILLIS_SECOND     = 1000;
    protected static final long       MILLIS_MINUTE     = 60 * MILLIS_SECOND;
    private static final   Logger     log               = LoggerFactory.getLogger(TokenService.class);
    private static final   Long       MILLIS_MINUTE_TEN = 20 * 60 * 1000L;
    // 令牌自定义标识
    @Value("${token.header}")
    private                String     header;
    // 令牌秘钥
    @Value("${token.secret}")
    private                String     secret;
    // 令牌有效期（默认30分钟）
    @Value("${token.expireTime}")
    private                int        expireTime;
    @Autowired
    private                RedisCache redisCache;

    /**
     * 获取用户身份信息
     *
     * @return 用户信息
     */
    public LoginUser getLoginUser(HttpServletRequest request) {
        // 获取请求携带的令牌
        String token = getToken(request);
        if (StringUtils.isNotEmpty(token)) {
            try {
                Claims claims = parseToken(token);
                // 解析对应的权限以及用户信息
                String    uuid    = (String) claims.get(Constants.LOGIN_USER_KEY);
                String    userKey = getTokenKey(uuid);
                LoginUser user    = redisCache.getCacheObject(userKey);
                return user;
            } catch (Exception e) {
                log.error("获取用户信息异常'{}'", e.getMessage());
            }
        }
        return null;
    }
	
    public CityLoginUser getCityLoginUser(HttpServletRequest request) {
        String token = getToken(request);
        if (!StringUtils.isNotEmpty(token)) {
            return null;
        }
        try {
            return this.redisCache.getCacheObject(getTokenKey((String) parseToken(token).get(Constants.LOGIN_USER_KEY)));
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * 设置用户身份信息
     */
    public void setLoginUser(LoginUser loginUser) {
        if (StringUtils.isNotNull(loginUser) && StringUtils.isNotEmpty(loginUser.getToken())) {
            refreshToken(loginUser);
        }
    }

    /**
     * 删除用户身份信息
     */
    public void delLoginUser(String token) {
        if (StringUtils.isNotEmpty(token)) {
            String userKey = getTokenKey(token);
            redisCache.deleteObject(userKey);
        }
    }

    /**
     * 创建令牌
     *
     * @param loginUser 用户信息
     * @return 令牌
     */
    public String createToken(LoginUser loginUser) {
        String token = IdUtils.fastUUID();
        loginUser.setToken(token);
        setUserAgent(loginUser);
        refreshToken(loginUser);

        Map<String, Object> claims = new HashMap<>();
        claims.put(Constants.LOGIN_USER_KEY, token);
        return createToken(claims);
    }
	
    public String createToken(ShopLoginUser shopLoginUser) {
        String token = IdUtils.fastUUID();
        shopLoginUser.setToken(token);
        setUserAgent(shopLoginUser);
        refreshToken(shopLoginUser);
        Map<String, Object> claims = new HashMap<>();
        claims.put(Constants.LOGIN_USER_KEY, token);
        return createToken(claims);
    }

    public String createToken(CityLoginUser cityLoginUser) {
        String token = IdUtils.fastUUID();
        cityLoginUser.setToken(token);
        setUserAgent(cityLoginUser);
        refreshToken(cityLoginUser);
        Map<String, Object> claims = new HashMap<>();
        claims.put(Constants.LOGIN_USER_KEY, token);
        return createToken(claims);
    }

    /**
     * 验证令牌有效期，相差不足20分钟，自动刷新缓存
     *
     * @param loginUser
     * @return 令牌
     */
    public void verifyToken(LoginUser loginUser) {
        long expireTime  = loginUser.getExpireTime();
        long currentTime = System.currentTimeMillis();
        if (expireTime - currentTime <= MILLIS_MINUTE_TEN) {
            refreshToken(loginUser);
        }
    }

    public void refreshToken(ShopLoginUser shopLoginUser) {
        shopLoginUser.setLoginTime(Long.valueOf(System.currentTimeMillis()));
        shopLoginUser.setExpireTime(Long.valueOf(shopLoginUser.getLoginTime().longValue() + (((long) this.expireTime) * MILLIS_MINUTE)));
        this.redisCache.setCacheObject(getTokenKey(shopLoginUser.getToken()), shopLoginUser, Integer.valueOf(this.expireTime), TimeUnit.MINUTES);
    }

    public void refreshToken(CityLoginUser cityLoginUser) {
        cityLoginUser.setLoginTime(Long.valueOf(System.currentTimeMillis()));
        cityLoginUser.setExpireTime(Long.valueOf(cityLoginUser.getLoginTime().longValue() + (((long) this.expireTime) * MILLIS_MINUTE)));
        this.redisCache.setCacheObject(getTokenKey(cityLoginUser.getToken()), cityLoginUser, Integer.valueOf(this.expireTime), TimeUnit.MINUTES);
    }

    /**
     * 刷新令牌有效期
     *
     * @param loginUser 登录信息
     */
    public void refreshToken(LoginUser loginUser) {
        loginUser.setLoginTime(System.currentTimeMillis());
        loginUser.setExpireTime(loginUser.getLoginTime() + expireTime * MILLIS_MINUTE);
        // 根据uuid将loginUser缓存
        String userKey = getTokenKey(loginUser.getToken());
        redisCache.setCacheObject(userKey, loginUser, expireTime, TimeUnit.MINUTES);
    }

    /**
     * 设置用户代理信息
     *
     * @param loginUser 登录信息
     */
    public void setUserAgent(LoginUser loginUser) {
        UserAgent userAgent = UserAgent.parseUserAgentString(ServletUtils.getRequest().getHeader("User-Agent"));
        String    ip        = IpUtils.getIpAddr();
        loginUser.setIpaddr(ip);
        loginUser.setLoginLocation(AddressUtils.getRealAddressByIP(ip));
        loginUser.setBrowser(userAgent.getBrowser().getName());
        loginUser.setOs(userAgent.getOperatingSystem().getName());
    }

    public void setUserAgent(ShopLoginUser shopLoginUser) {
        UserAgent userAgent = UserAgent.parseUserAgentString(ServletUtils.getRequest().getHeader("User-Agent"));
        String    ip        = IpUtils.getIpAddr();
        shopLoginUser.setIpaddr(ip);
        shopLoginUser.setLoginLocation(AddressUtils.getRealAddressByIP(ip));
        shopLoginUser.setBrowser(userAgent.getBrowser().getName());
        shopLoginUser.setOs(userAgent.getOperatingSystem().getName());
    }

    public void setUserAgent(CityLoginUser cityLoginUser) {
        UserAgent userAgent = UserAgent.parseUserAgentString(ServletUtils.getRequest().getHeader("User-Agent"));
        String    ip        = IpUtils.getIpAddr();
        cityLoginUser.setIpaddr(ip);
        cityLoginUser.setLoginLocation(AddressUtils.getRealAddressByIP(ip));
        cityLoginUser.setBrowser(userAgent.getBrowser().getName());
        cityLoginUser.setOs(userAgent.getOperatingSystem().getName());
    }

    /**
     * 从数据声明生成令牌
     *
     * @param claims 数据声明
     * @return 令牌
     */
    private String createToken(Map<String, Object> claims) {
        String token = Jwts.builder().setClaims(claims).signWith(SignatureAlgorithm.HS512, secret).compact();
        return token;
    }

    /**
     * 从令牌中获取数据声明
     *
     * @param token 令牌
     * @return 数据声明
     */
    private Claims parseToken(String token) {
        return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
    }

    /**
     * 从令牌中获取用户名
     *
     * @param token 令牌
     * @return 用户名
     */
    public String getUsernameFromToken(String token) {
        Claims claims = parseToken(token);
        return claims.getSubject();
    }

    /**
     * 获取请求token
     *
     * @param request
     * @return token
     */
    private String getToken(HttpServletRequest request) {
        String token = request.getHeader(header);
        if (StringUtils.isNotEmpty(token) && token.startsWith(Constants.TOKEN_PREFIX)) {
            token = token.replace(Constants.TOKEN_PREFIX, "");
        }
        return token;
    }

    private String getTokenKey(String uuid) {
        return CacheConstants.LOGIN_TOKEN_KEY + uuid;
    }
}
